... can be OEM & ODM 4.custom usb 5.hight quality Min pen drive/usb flash drive/usb flash memory/usb flash disk Specification: Operating SystemRequired above ... .0 ,USB 2.0 , compatible with USB 1.1Available Capacity1GB,2GB,4GB,8GB,16GB,32GB,64GB with full capacityPlug-and-PlayNo External Power ... ,but small order is ok,like 1pc usb flash drive Q: How is your USB flash drive?Is it real capacity?A: Of course ...